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Finding the Fourth Proportional to 108,906.76, 163,206.90 and 86,621.22

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Solution

The fourth proportional to 108,906.76, 163,206.90 and 86,621.22 is: 129,809.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,906.76 : 163,206.90 = 86,621.22 : x
  2. Step 2: Convert to fraction form
    108,906.76/163,206.90 = 86,621.22/x
  3. Step 3: Cross multiply
    108,906.76x = 163,206.90 × 86,621.22
  4. Step 4: Simplify right side
    108,906.76x = 14,137,180,790.42
  5. Step 5: Solve for x
    x = 14,137,180,790.42/108,906.76
  6. Step 6: Final answer
    x = 129,809.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.